Authentication (from Greek: αὐθεντικός; real or genuine, from αὐθέντης authentes; author) is the act of confirming the truth of an attribute of a datum or entity. This might involve confirming the identity of a person or software program, tracing the origins of an artifact, or ensuring that a product is what its packaging and labeling claims to be.
Read more about Authentication: Methods, Factors and Identity, Product Authentication, Information Content, History and State-of-the-art, Authorization, Access Control